Firefox shows a blinking "edit" cursor in the body of all websites when I click.

Clicking a button within a webpage puts a blinking text cursor in the body of the site, as if editing a Word document. It's not causing any other problems besides being really annoying and distracting, but it only just started today. I've tried restarting Firefox with add-ons disabled, as well as reinstalling Firefox clean.

Clicking a button within a webpage puts a blinking text cursor in the body of the site, as if editing a Word document. It's not causing any other problems besides being really annoying and distracting, but it only just started today. I've tried restarting Firefox with add-ons disabled, as well as reinstalling Firefox clean.

Chosen solution

In addition to the above:

This is likely caused by switching on caret browsing and you can toggle caret browsing on/off by pressing F7 (Mac: fn + F7).

In addition to the above:
This is likely caused by switching on caret browsing and you can toggle caret browsing on/off by pressing F7 (Mac: fn + F7).
*http://kb.mozillazine.org/accessibility.browsewithcaret
Note that this is an accessibility feature of Firefox.
*Tools > Options > Advanced > General > Accessibility: [ ] "Always use the cursor keys to navigate within pages"
*http://kb.mozillazine.org/Scrolling_with_arrow_keys_no_longer_works
*http://kb.mozillazine.org/Accessibility_features_of_Firefox